Re: pci extensions (was: *New* PCI bus standard?)

["John R Pierce" <pierce@hogranch.com>]

>>  1.  How feasible is 133MHz bus clocking/signalling
>>      really with the current art of silicon?  Could
>>      you really pump it through a connector or would
>>      this be an on-board-only technology?
>
>AGP-1X runs at 66MHz.
>
>AGP-2X is here now, and moves bits twice as fast, effectively 133MHz
>(although the fastest clock/strobe is still 66MHz, but uses both edges).
>All AGP platforms must support this speed.
>
>AGP-4X is in the released spec.  Effectively 267M/s data transfer rates,
>using 133MHz strobes.  The silicon is different; Vdd is only 1.5V.
>
>All three speeds support connectors.


but they only support ONE connector, its not a bus, its a point to point
connection.  I suspect any faster PCI bus technology that supports a backplane
is going to require a seperate port for each slot.